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Re: Hilborn EFI 512 Charger [Re: CSK] #2770619
05/03/20 01:06 AM
05/03/20 01:06 AM
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Pattison Texas
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Well,,, made the drive & I am about 99% sure the sprag in the Converter is broken,but I could be wrong, when leaving the car felt like it was in 3rd gear & at about 20 feet out the car would start pulling hard, 1.727 60 ft, no spinning, 11.21 @123.2 1700 da, looking at the data log it flashed to 3500 at the leave, normal has been 4800. & even normal driving the car feels sluggish & the cruise rpm is up by about 250 rpm, still had a great time & the weather was nice, so now I am done until I can fix it & also have to wait for fall weather, Summer is now here starting next week, Thanks to everyone for the input & keeping up with my silly drag racing efforts. converter was $1300, I think I know how it broke, I hit it hard on a slick street & it spun hard & it bit & I lifted, same as when the trans sprag gets wadded up.

Last edited by csk; 05/03/20 08:15 AM.

1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5

Re: Hilborn EFI 512 Charger [Re: CSK] #2789877
06/27/20 02:17 PM
06/27/20 02:17 PM
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Pattison Texas
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Well I made a mistake, I dropped the Trans pan & it was clean but the fluid & filter needed changed, about 5k miles on it & it seemed very thin, with that done it tightened the converter stall a little, after my last passes at the track i could not find my on track data logs on my computer, well I recently found them, here is what I did wrong, I had installed longer runners & driving on the street it felt great, but it would spin the tires A LOT, so when I went to the track it would hook GREAT, & now the computer efi, was using fuel map cells that it had never used on the street because of tire spin, so at about 20' out it went VERY lean over 22 to 1 AFR to about the 60', USER ERROR LOL, I had all those fuel map cells limited to only adding 10% more fuel & it need more like 30 % in those cells, with that all said I have NOW changed the gear from 3.54 to a 4.10, am going to try & go to the track August 15, they will be running at night, so hopefully I can deal with the heat, looking at last year in August the DA was 3000ft, you can see, the left & right o2 sensors followed the TPS all the way off the screen lean. it was so lean it didnt hurt the motor.

Screenshot (62).png
Last edited by csk; 06/27/20 02:20 PM.

1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5

Re: Hilborn EFI 512 Charger [Re: CSK] #2789879
06/27/20 02:21 PM
06/27/20 02:21 PM
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Pattison Texas
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1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5

Re: Hilborn EFI 512 Charger [Re: fast68plymouth] #2789885
06/27/20 02:30 PM
06/27/20 02:30 PM
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Mt Morris Michigan
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Someone once posted to drill a small hole in the bottom of the stack to prevent siphoning with velocity stacks.

Re: Hilborn EFI 512 Charger [Re: CSK] #2789897
06/27/20 02:57 PM
06/27/20 02:57 PM
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So. Burlington, Vt.
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Charlie...... sounds like not having that “10” under your belt has been nagging away at you.

Hopefully the tune and the gears will get you there. smoke


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: Hilborn EFI 512 Charger [Re: fast68plymouth] #2789907
06/27/20 03:19 PM
06/27/20 03:19 PM
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Originally Posted by fast68plymouth
Charlie...... sounds like not having that “10” under your belt has been nagging away at you.

Hopefully the tune and the gears will get you there. smoke


You THINK LOL , its all I live for :), its funny how that happens even for an old man like me, when I 1st started this project I thought, if it runs High 11's thats all I will need I will be happy with that, its just a street car, well when you run an 11.04 whatcha gonna do LMBO, last time out with the bad tune it ran 123. mph 1700ft DA, I will keep Y'all posted , also this new gear REALLY tightened up the converter just driving around slow.

Last edited by csk; 06/27/20 03:24 PM.

1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5

Re: Hilborn EFI 512 Charger [Re: CSK] #2789913
06/27/20 03:32 PM
06/27/20 03:32 PM
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So. Burlington, Vt.
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Quote
also this new gear REALLY tightened up the converter just driving around slow.


You might want to do the high gear rolling stall test.
It might actually have a converter issue.

The flash stall would hardly be affected at all by that test.
So....... it should basically be the same as it was before when tested that way.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: Hilborn EFI 512 Charger [Re: fast68plymouth] #2789915
06/27/20 03:41 PM
06/27/20 03:41 PM
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Originally Posted by fast68plymouth
Quote
also this new gear REALLY tightened up the converter just driving around slow.


You might want to do the high gear rolling stall test.
It might actually have a converter issue.

The flash stall would hardly be affected at all by that test.
So....... it should basically be the same as it was before when tested that way.


Thanks Dwayne, thats good to know, I will do that & see what happens, as always I REALLY appreciate your help & input.


1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5

Re: Hilborn EFI 512 Charger [Re: CSK] #2792327
07/03/20 12:57 PM
07/03/20 12:57 PM
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I pulled over to take a picture,, 10,000 miles on this since I put it all together, One engine refresh @ the 5k mark for a bad camshaft & tool steel lifter combination, now a Hydro Roller, so now 5k on this set up, so far so good, just drained the oil & filter change looks very good, clean filter & it had 1kmiles of use.

105967482_3152978171427537_5638645788780136713_o.jpg
Last edited by csk; 07/03/20 01:10 PM.

1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5

Re: Hilborn EFI 512 Charger [Re: CSK] #2792337
07/03/20 01:25 PM
07/03/20 01:25 PM
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So. Burlington, Vt.
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Have you done the rolling high gear stall test with the 4.10’s yet?


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: Hilborn EFI 512 Charger [Re: fast68plymouth] #2792343
07/03/20 01:59 PM
07/03/20 01:59 PM
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Originally Posted by fast68plymouth
Have you done the rolling high gear stall test with the 4.10’s yet?


No I went out today to try but the holiday weekend traffic is REALLY bad, all my test & tune roads are under construction, I will keep you in the loop, Have a GREAT 4th smile

Last edited by csk; 07/03/20 01:59 PM.

1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5

Re: Hilborn EFI 512 Charger [Re: CSK] #2792364
07/03/20 03:47 PM
07/03/20 03:47 PM
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Originally Posted by csk
Originally Posted by fast68plymouth
Have you done the rolling high gear stall test with the 4.10’s yet?


No I went out today to try but the holiday weekend traffic is REALLY bad, all my test & tune roads are under construction, I will keep you in the loop, Have a GREAT 4th smile


I went looking for a safe road to get stupid on & found one smile this is the 1st time I did this in high gear went to 4900ish , I also did 1st gear from a 5 mph roll & it went to 5100ish just like normal, doing this also made some big changes in the tuning on the fuel map. all & all the converter feels like its working good, The DA is 3300ft right now ,,, HOT!!!! good thing this junker has A/C smile

Screenshot (63).pngScreenshot (64).png
Last edited by csk; 07/03/20 03:48 PM.

1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5

Re: Hilborn EFI 512 Charger [Re: CSK] #2792396
07/03/20 05:55 PM
07/03/20 05:55 PM
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Even in Chicago it's hot and my black Charger was also telling me that at every stop light today watchin the temp gauge rise! Luckily it cools back down when moving.


70 Sport Fury
68 Charger
69 Coronet
72 RR
Re: Hilborn EFI 512 Charger [Re: fast68plymouth] #2794363
07/08/20 02:25 PM
07/08/20 02:25 PM
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Pattison Texas
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Originally Posted by fast68plymouth
Have you done the rolling high gear stall test with the 4.10’s yet?


Hey Dwayne, I did the converter test & posted the data log a few days ago


1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5

Re: Hilborn EFI 512 Charger [Re: CSK] #2794414
07/08/20 04:54 PM
07/08/20 04:54 PM
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4900 should work fine.

Maybe try it a few more times if you can before going to the track to give the EFI more time to learn it?
(I don’t know if that’s how it works or not)


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: Hilborn EFI 512 Charger [Re: fast68plymouth] #2794421
07/08/20 05:07 PM
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Originally Posted by fast68plymouth
4900 should work fine.

Maybe try it a few more times if you can before going to the track to give the EFI more time to learn it?
(I don’t know if that’s how it works or not)


Yes that is what it does, you are correct I need to drive it & load it up. with this 4.1 gear on the street it does not BLOW the tires off as bad, they still spin but more controlled, you can see on the 2nd Data log when I nailed it in 1st gear the rpm went 6k The red line just for .5 second & then the car hooked & the rpm came down to 5100 ish.

Last edited by csk; 07/08/20 05:08 PM.

1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5

Re: Hilborn EFI 512 Charger [Re: CSK] #2823121
09/21/20 12:23 AM
09/21/20 12:23 AM
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Well it was time to replace the MT Street R Drag Radials, 6k miles on them & they had become egg shaped, I guess I should have been lifting the rear when parked in the garage, especially after a long drive in the summer when they get VERY hot, I went with the same 325-50-15 but in the Hoosier brand DR, they seem VERY soft to the fingernail, so now waiting on a cool weather Track rental day, it is still pretty warm [HOT] here in Southeast Texas, so the next time out will be testing the new 4.10 gears,, it had 3.54 & the new Hoosier's.

119902022_3385220024870016_8942946624601101738_n.jpg
Last edited by csk; 09/21/20 08:52 AM.

1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5

Re: Hilborn EFI 512 Charger [Re: CSK] #2823167
09/21/20 08:29 AM
09/21/20 08:29 AM
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Pattison Texas
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I also made a rear upper shock x member change, I bought a upper from RMS, that they use with the Street lynx 4 link set up, it is made to go in front of the Diff, I ordered mine without the upper arm welded tabs, turn it around backwards & install it in between the factory x member & it stands the shocks up more vertical. I had to remove my tail pipes for clearance, will have to do some modifications to the pipes , but will run with dumps for now, it is surprisingly quiet without them

119057902_3351375821587770_1872768959648185379_n.jpg119138107_3351375991587753_2390217647643688035_n.jpg119054876_3355550114503674_4042499762126654709_n.jpg119037954_3355550307836988_9183019113978163947_n.jpg
Last edited by csk; 09/21/20 08:32 AM.

1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5

Re: Hilborn EFI 512 Charger [Re: CSK] #2823270
09/21/20 01:00 PM
09/21/20 01:00 PM
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north of coder
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i'm surprised you are using air shocks ! shock
beer

Re: Hilborn EFI 512 Charger [Re: moparx] #2823282
09/21/20 01:19 PM
09/21/20 01:19 PM
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Tulsa OK
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Do you race it with those shocks?


68 Barracuda Formula S 340
87 "Chrysler" Conquest
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